mineral
Milky quartz vein in host rock
Quartz, SiO₂, likely with iron-oxide staining; host rock is not identifiable from the image
AI-generated identification · may be incorrectWhite to cream, translucent patches with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage. The rusty-brown areas likely reflect iron staining.
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Physical properties
White to cream, translucent patches with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage. The rusty-brown areas likely reflect iron staining.
Formation & geological history
Quartz commonly precipitates from silica-rich fluids filling fractures in surrounding rock; the specimen’s age and exact host geology cannot be determined visually.
Uses & applications
Quartz is used in glass, electronics, and abrasives; attractive pieces may be kept as inexpensive mineral specimens.
Geological facts
Milky appearance results from tiny fluid or gas inclusions that scatter light; iron oxides can tint quartz yellow or brown.
Field identification & locations
Look for hardness greater than glass, lack of cleavage, and irregular fracture; quartz veins occur in many rock types worldwide. The image suggests quartz attached to a brown host, but does not show diagnostic features to identify that host.
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